Answer: I used to have the same problem but it was compounded by the fact that my mums were rather "leggy" and thin. I corrected the legginess and delayed bloom by cutting the mums back twice a year. In June, I cut back the chrysanthemums to 2" in height. In July, I cut them back to 6" in height. Since I have started doing this I have full, lush mums that bloom September through October.
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